Retrograde timepiece display with a retractable hand
AssigneeBlancpain SA
InventorsMehdi Denden, Edmond Capt
Life of this patent
Estimating the term…
Abstract
Timepiece display mechanism including a cam driven by a time base, and a pivoting lever including an elastically returned feeler member following the contour of the cam and a first rack meshing with a first angular orientation wheel which drives an indicator plate synchronously or via a differential mechanism, the indicator plate projecting radially with respect to a main axis and being parallel to or coplanar with the first wheel, the display mechanism includes a connecting rod articulated at a first end to a carriage slidably mounted on the indicator plate and carrying a retractable hand, a second end of the connecting rod being pivoted on a fixed pivot or on a movable pivot comprised in an elongation wheel set driven directly or indirectly by the lever.
Claims19
A timepiece display mechanism comprising, arranged on a bridge:
- a cam to be driven by a time base, and
- a lever pivoting about a lever axis and including at a first end, a feeler member following the contour of said cam under the action of an elastic return and at a second end, a first rack meshing with a first angular orientation wheel for the rotational driving thereof about a first axis, said first angular orientation wheel driving an indicator plate synchronously or via a differential mechanism, said indicator plate projecting radially with respect to a main axis and being parallel to or coplanar with said first wheel, wherein
- said display mechanism includes a connecting rod articulated at a first end to a carriage mounted to slide on said indicator plate and carrying a retractable hand, a second end of said connecting rod being pivoted, either on a fixed pivot on said bridge, or on a movable pivot comprised in an elongation wheel set directly or indirectly driven by said lever.
Dependencies are inferred from the claim text.